Anti-corrosion composition

Abstract

The invention relates to an anti-corrosion composition comprising at least one first butyl rubber having an apparent viscosity according to Brookfield measured at 66° C. according to DIN EN ISO 2555 in a range of approximately 400,000 mPa·s to approximately 2,000,000 mPa·s and has an average molecular weight in a range of approximately 20,000 to approximately 60,000 and at least one second butyl rubber having an average molecular weight in a region of approximately 150,000 to approximately 2,000,000 and a Mooney viscosity ML (1+8) measured at 125° C. in a range of approximately 25 MU to approximately 65 MU, measured according to ISO 289.

The invention claimed is: 
     
       1. An anti-corrosion composition comprising:
 at least one first butyl rubber having an apparent viscosity according to Brookfield at 66° C. according to DIN EN ISO 2555 in a range of approx. 400,000 mPa·s to approx. 2,000,000 mPa·s and an average molecular weight in a range of approx. 20,000 to approx. 60,000 and at least one second butyl rubber having an average molecular weight in a range of approx. 150,000 to approx. 2,000,000 and a Mooney viscosity ML (1+8) at 125° C. in a range of approx. 25 MU to approx. 65 MU, measured according to ISO 289. 
 
     
     
       2. The composition according to  claim 1 , wherein the at least one first butyl rubber is present in the composition in a quantity in a range of approx. 20% by weight to approx. 66% by weight, in relation to an overall quantity of the composition. 
     
     
       3. The composition according to  claim 1 , wherein the at least one second butyl rubber is present in the composition in a quantity in a range of approx. 5% by weight to approx. 50% by weight, in relation to an overall quantity of the composition. 
     
     
       4. The composition according to  claim 1 , wherein the at least one first butyl rubber is selected from a group comprising depolymerized butyl rubbers. 
     
     
       5. The composition according to  claim 1 , wherein the at least one second butyl rubber has values for the unsaturatedness in a range of approx. 1 mol-% to approx. 3 mol-%. 
     
     
       6. The composition according to  claim 1 , wherein the at least one second butyl rubber is formed of produced through a copolymerization of isobutylene and isoprene in methyl chloride serving as a solvent. 
     
     
       7. The composition according to  claim 1 , further comprising at least one third, in particular cross-linked butyl rubber, or at least one filler, or at least one antioxidant, or at least one cross-linking agent, or at least one elastomer, and/or or at least one stabilizer and combinations thereof. 
     
     
       8. The composition according to  claim 7 , wherein the at least one filler is present in the composition in a quantity in a range of approx. 20% by weight to approx. 70% by weight, in relation to an overall quantity of the composition. 
     
     
       9. The composition according to one of the  claim 7 , wherein the at least one filler is powdered or fibrous. 
     
     
       10. The composition according to  claim 7 , wherein the composition comprises a first powdered filler and a second fibrous filler. 
     
     
       11. The composition according to  claim 7 , wherein the at least one elastomer is selected from a group comprising polyisobutylene having a Staudinger index J o  in a range of approx. 230 cm 3 /g to approx. 900 cm 3 /g, and having an average molar mass (viscosity agent) in a range of approx. 900,000 g/mol to approx. 5,500,000 g/mol. 
     
     
       12. The composition according to  claim 1 , wherein the composition is present in the form of a tape or a mat. 
     
     
       13. The composition according to  claim 12 , wherein the tape has a two-layered or multi-layered structure, wherein at least one layer comprises the composition. 
     
     
       14. A method for obtaining a corrosion protection on pipes and units comprising pipes, as well as other units and installations comprising the steps of:
 applying the composition of  claim 1  to a structure to be protected. 
 
     
     
       15. The method according to  claim 14 , wherein the step of applying the composition includes wrapping the structure to be protected with an at least one layered tape. 
     
     
       16. An at least single-layered wrapping tape, comprising the composition according to  claim 1 .